As a fisherman, i say if you want to eat fish, catch it yourself...either that or eat something farmed...If you want to commercial fish, force them to use a rod and reel. Imagine people could sell game meat by dragging a net through the Forrest to collect all the deer and moose?
This all shows that sustainable commercial fisheries dont exist unless extremely heavily regulated. And even then, the populations remain nowhere near their natural level. Just look at the stories from the 1800's fishing was literally like shooting fish in a barrel.
I've heard horror stories of gill nets being strung across moon river before too, how can we expect to have any fish left if we allow people to completely annihilate the fisheries.
If people had to learn what it takes to actually catch a fish, they would have more respect for our fisheries, and even more respect for the environment that holds the fish they are eating.